//
// SKServer.swift
//
// Copyright © 2017 Peter Zignego. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

#if !COCOAPODS
@_exported import SKCore
#endif

public protocol SlackKitServer {
    func start()
}

public protocol Middleware {
    func respond(to request: (RequestType, ResponseType)) -> (RequestType, ResponseType)
}

public final class SKServer {
    internal let server: SlackKitServer

    public init?(server: SlackKitServer? = nil, responder: SlackKitResponder) {
        if let server = server {
            self.server = server
        } else {
            self.server = SwifterServer(responder: responder)
        }
    }

    public convenience init?(server: SlackKitServer? = nil, responder: SlackKitResponder, oauth: OAuthConfig) {
        var res = responder
        res.routes.append(SKServer.oauthRequestRoute(config: oauth))
        self.init(server: server, responder: res)
    }

    private static func oauthRequestRoute(config: OAuthConfig) -> RequestRoute {
        let oauth = OAuthMiddleware(config: config)
        return RequestRoute(path: "/oauth", middleware: oauth)
    }

    public func start() {
        server.start()
    }
}
